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Journals

Low-Temperature Kinetics of Reactions of the OH Radical With Propene and 1-Butene Studied by a Pulsed Laval Nozzle Apparatus Combined With Laser-Induced Fluorescence

August 1, 2001

Author(s)

A B. Vakhtin, S Lee, Dwayne E. Heard, I W. Smith, S R. Leone

The kinetics of the reactions of the OH radical with propene and 1-butene are studied at T = 103 K. The low-temperature environment is provided by a pulsed...

Temporal Character of Pulsed-Laser Cone Emission

August 1, 2001

Author(s)

W Gawlik, R Shuker, Alan Gallagher

Temporal character of cone emission from Sr vapor excited with 3 ns, near-resonant laser pulses is studied with 0.5 ns resolution. The cone pulses appear...

Kinetics of Reactions of C₂H Radical With Acetylene, O₂, Methylacetylene, and Allene in a Pulsed Laval Nozzle Apparatus at T = 103 K

August 1, 2001

Author(s)

A B. Vakhtin, Dwayne E. Heard, I W. Smith, S R. Leone

The rate constants of the reactions of C 2H radical with HCidentical with}CH (k 1), O 2(k 2), CHd3^Cidentical with}CH(k 3), and H 2C=C=CH 2(k 4) are measured at...

Suppression of Elastic Scattering Loss for Slowly Colliding Bose-Einstein Condensates

August 1, 2001

Author(s)

Y B. Band, J P. Burke, A Simoni, Paul S. Julienne

Partial superfluid suppression of the elastic scattering loss in atomic Bose condensed systems is significant when the ratio of the relative velocity of the...

Concentration Modulation Spectroscopy With a Pulsed Slit Supersonic Discharge Expansion Source

August 1, 2001

Author(s)

S Davis, M Farnik, D Uy, David Nesbitt

Frequency modulated discharges are combined with pulsed slit supersonic expansions to provide an intense, long path source of jet-cooled radicals/molecular ions...

Lead, Tin, and Germanium in the Small Magellanic Cloud Main-Sequence B Star AV 304

August 1, 2001

Author(s)

C R. Proffitt, Craig J. Sansonetti, Joseph Reader

We have determined the lead, tin, and germanium abundances of the early B main-sequence star AV 304 in the Small Magellanic Cloud (SMC) by using archival STIS...

Definitions of the Units Radian, Neper, Bel, and Decibel

August 1, 2001

Author(s)

I M. Mills, Barry Taylor, A J. Thor

The definition of coherent derived units in the International System of Units (SI) is reviewed, and the important role of the equations defining physical...

Phase-Coherent Optical Pulse Synthesis From Separate Femtosecond Lasers

August 1, 2001

Author(s)

R K. Shelton, L -. Ma, H C. Kapteyn, M M. Murnane, John L. Hall, Jun Ye

We generated a coherently synthesized optical pulse from two independent mode-locked femtosecond lasers, providing a route to extend the coherent broadwidth...

Atmospheric Oxidation Mechanism of Methyl Pivalate, (CH₃)₃CC(O)OCH₃

August 1, 2001

Author(s)

T J. Wallington, Y Ninomiya, M Mashino, M Kawasaki, Vladimir L. Orkin, Robert E. Huie, Michael J. Kurylo III

Flash photolysis-resonance fluorescence techniques were used to measure the rate constant for the reaction of OH radicals with methyl pivalate, (CH 3) 3CC(O)OCH...

Molecular Engineering of a Polymer of Tetrameric Hemoglobins

August 1, 2001

Author(s)

C Fronticelli, D Arosio, K M. Bobofchak, G B. Vasquez

We have engineered, a recombinant mutant human hemoglobin, Hb prisca Β(S9C+C112G), which assembles in a polymeric form. The polymerization is obtained through...

Progress Towards an International Standard for Data Transfer in Rapid

August 1, 2001

Author(s)

Lalit Patil, D Dutta, Ram D. Sriram, Kevin W. Lyons, Amba D. Bhatt, Mike Pratt, M Allahabad

This paper discusses the informational requirements of rapid prototyping and layered manufacturing (RPLM). The study is motivated by the recent decision to...

Comparitive Studies of the Microwave Nonlinearities in High Temperature Superconducting Thin Films and Devices

August 1, 2001

Author(s)

James Booth, Leila R. Vale, Ronald H. Ono

We have studied nonlinear, power-dependent, behavior of high temperature superconducting thin films, transmission lines, and resonators. Here we present...

Domain-Engineered Thin-Film LiNbO₃ Pyroelectric-Bicell Optical Detector

August 1, 2001

Author(s)

John H. Lehman, A. M. Radojevic, R M. Osgood

We have fabricated a bicell detector consisting of a single freestanding 10 um thick film of single-crystal lithium niobate (LiNbO3), having two adjacent...

The Effects of Offset Voltage on the Amplitude and Bandwidth of Kick-Out Pulses Used in the Nose-To-Nose Sampler Impulse Response Characterization Method

August 1, 2001

Author(s)

Donald R. Larson, Nicholas Paulter

The amplitude and bandwidth of kick-out pulses used in the nose-to-nose sampler impulse response characterization method were measured as a function of offset...

Moving the Pulsed Heating Technique Beyond Monolithic Specimens: Experiments with Coated Wires

August 1, 2001

Author(s)

Daniel Josell, D Basak, J L. McClure, Ursula R. Kattner, Maureen E. Williams, William J. Boettinger, M Rappaz

Pulsed heating experiments based on pyrometric measurement of the temperature-time history of metal specimens rapidly heated by passage of electric current have...

Database-Assisted Design, Standardization, and Wind Direction Effects - Closure

August 1, 2001

Author(s)

A Rigato, P Chang, Emil Simiu

The writers present a simple methodology, developed for use in design assisted by electronic acrodynamic and climatological databases (for short, database...

Electrical Impedance Spectra to Monitor Damage, During Tensile Loading, of Cement Composites

August 1, 2001

Author(s)

A Peled, J M. Torrents, T Mason, S Shah, Edward Garboczi

Conductive fibers can reinforce concrete and monitor damage leading to the development of a smart material. This work studied the correlation between the...

Kinetics of Reaction of Calcium Hydroxide and Fly Ash

August 1, 2001

Author(s)

Joseph J. Biernacki, P J. Williams, Paul E. Stutzman

The alkali activated reaction kinetics of a type-F fly ash with calcium hydroxide (CH) and water has been investigated at temperatures between 25 and 60 C...

Analysis of the Impedance Spectra of Short Conductive Fiber-Reinforced Composites

August 1, 2001

Author(s)

J M. Torrents, T Mason, A Peled, S Shah, Edward Garboczi

The presence of small amounts of short conductive fibers in a composite of finite matrix conductivity results in the subdivision of the one matrix impedance arc...

Imaging Phase Separated Domains in Conducting Polymer Blend Films With Near-Field Scanning Optical Microscopy

August 1, 2001

Author(s)

Jeeseong C. Hwang, Lori S. Goldner, Alamgir Karim, C L. Gettinger

We report on the use of near-field scanning optical microscopy to study phase-separation in polymer films of polmer films of poly(styrene) and poly (3...

Thermochemistry of Adenosine

August 1, 2001

Author(s)

J A. Boerio-Goates, M R. Francis, Robert N. Goldberg, M A. Ribeiro da Silva, M D. Ribeiro da Silva, Yadu D. Tewari

The thermochemistry of adenosine(cr) was studied by a variety of methods: the standard (pressure p = 0.1 MPa) molar enthalpy of combustion in oxygen at T = 298...

Active Site Structure and Mechanism of Human Glyoxalase I - An Ab Initio Theoretical Study

July 25, 2001

Author(s)

U Richter, Morris Krauss

The structure of the active site of human glyoxalase I and the reaction mechanism of the enzyme-catalyzed conversion of the thiohemiacetal, formed from...

The Effect of Query Choice on Information Retrieval

July 20, 2001

Author(s)

Walter S. Liggett Jr, C E. Buckley

Analysis of the Query Track of the Eighth Text Retrieval Conference (TREC-8) shows how the presence or absence of a word or two in a query can make a large...

The Joint Distribution of the Mean and an Extremum of a Normal Sample, With Applications to Quality Control

July 20, 2001

Author(s)

M Vangel

In some industrial applications one compares a sample mean and minimum, or a mean and maximum, to reference values, and determines if the lot from which the...

PVT Measurements for Toluene in the Near-Critical and Supercritical Regions

July 19, 2001

Author(s)

Asbat E. Bazaev, Ilmutdin Abdulagatov, Joe W. Magee, Emil Bazaev, Michail Rabezkii

The PVT relationships of toluene were measured in the near-critical and supercritical regions. Measurements were made using a constant-volume peizometer...

Conformity Assessment in the North American Market: 21st Century Challenges and Opportunities

July 18, 2001

Author(s)

Belinda L. Collins

Conformity assessemnt arrangements that exist between a variety of national and international bodies and agencies, primarily at the voluntary level, were...

Study of Moisture and Binder Content of Spray Dried Alumina Granules

July 16, 2001

Author(s)

James F. Kelly, S Jahanmir

A round robin testing program for IEA Annex II Subtask 12 was carried out to test procedures for measurement of moisture and binder content of alumina granules...

Fitting vapor pressure temperature data: simplicity and unintended consequences

July 1, 2001

Author(s)

Michael D. Frenkel, K. R. Hall, S M. Mannan, G A. Iglesias-Silva

Extreme Wind Load Estimates Based on the Gumbel Distribution of Dynamic Pressures: An Assessment

July 1, 2001

Author(s)

Emil Simiu, A N. Heckert, James J. Filliben, Steven K. Johnson

We present a contribution to the current debate on whether it is more appropriate to fit a Gumbel distribution to the time series of the extreme dynamic...

Shrinkage-Reducing Admixtures and Early-Age Desiccation in Cement Pastes and Mortars

July 1, 2001

Author(s)

M R. Geiker, K K. Hansen

Fundamental studies of the early-age desiccation of cement-based materials with and without a shrinkage-reducing admixture (SRA) have been performed. Studies...

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